Both Xanax and Rohypnol are sleeping aids. However they both work differently.
Rohypnol has a more prolong hang over effect. Xanax is milder. Both can be abused.
Prescription is usually by physciatrist. An insomniac will be evaluated and the doctor will decide if sleeping medication is needed. Here is some pictures of roypnol online.
You can buy rohypnol from website easily with cards such as Visa and Mastercard.